Robert is left furious when things don’t go as planned. Mary’s undercover assignment is nearly blown. Violet is quick to save the day. The events surrounding Green’s death are under scrutiny. Mrs Patmore is left devastated when old wounds are opened. Branson receives a proposition regarding the future of the Downton estate.

Sarah continues to cause trouble above stairs, however this time she may have gone too far. Elsewhere Thomas is suffering an illness, Baxter suspects there is more to it than he is letting on. Violet reveals the truth to Isobel the truth about her past with Prince Kuragin. Mary comes to a decision regarding Lord Gillingham.